P‐52: Study on Viewing Angle of Novel Ultra‐Large OLED Display

This paper presents an investigation into the specific requirements pertaining to viewing angle, viewing angle of optical correction, and viewing distance in the context of a display device's viewable angle within a top‐emission OLED, as display sizes scale up from mobile phone dimensions to over 100 inches. The larger display size is, the slower L‐decay rate with varying viewing angles must be. The paper proposes an approach to optimize display difference of viewing angles by incorporating an auxiliary cathode within OLED, which thinning the cathode thickness while ensuring that impedance requirements. Additionally, an enhanced light diffusion layer is introduced in the MDL structure to broaden the display's viewing angle, achieving less than 50% L‐decay at viewing angle of 66° and color shift below 2 JNCD. The optimization of the viewing angle contributes to improving image quality and advancing technology in ultra‐large size OLEDs.